GCSE OCR Biology: B1.2 What happens in cells?

All resources for B1.2 What happens in cells? GCSE OCR Biology Gateway 9-1. Triple and combined (Higher and Foundation) is covered in this material.

Each PowerPoint is a whole lessons included with student activities and animated answers.

• DNA stands for deoxyribonucleic acid.
• DNA is found in the nucleus of cells.
• DNA is packaged into a thread-like structure called chromosomes.
• Humans typically have 46 chromosomes shared from their parents.
• Genes are sections of DNA that code for physical characteristics.
• The structure of DNA.
• DNA is comprised of monomers called nucleotides.
• A nucleotide consists of a phosphate group, a sugar (deoxyribose), and an organic base.
• There are four organic bases: Adenine, A. Thymine, T. Cytosine, C. Guanine, G.
• Hydrogen bonds in DNA.
• The role of proteins and AI
• Proteins as polymers
• Explaining transcription
• mRNA and complementary bases
• Explaining translation
• Enzymes are made of protein.
• Enzymes are biological catalysts.
• Catalysts speed up the rate of reaction without being used up themselves.
• Enzymes and the lock and key hypothesis.
• Enzymes breaking down and bonding substrates.
• Enzymes-catalysed reactions
• Rate of reaction
• Denaturing of enzymes and the active site
• Optimum temperature and optimum pH for enzymes
• Definition of concentration
• Increasing concentration of enzymes and substrates
• Saturation of substrates